Cross connection for dynamo-electric machines.



PATENTED MAR. 17, 1-908.

W. H. FOOT. "(moss GQNNEOTEION FOR DYNAMO ELEGTRIO MACHINES.

APPIIIGATLG-N-HEED APR.2s,190s.-

vINVENTOR y MM wi 2:

fi ATTORNEY Gil - to the proper winding coils.

UNITED STATES FATE NT OFFICE.

WILLIAM lI. 'l()()l. ()l" WILKINSBLIRG, PENNSYLVANIA,

ASSIIJXUR T0 WESTINGHOUSE CROSS CONNECTION FOR DYNAMO-ELECTRIC MACHINES.

M invention relates to cross connections for r ynamo-electric machinesand-it has, for its ob ect to providean improved meansforinterconnecting equipotential points in the windingsot' such machines asare subjected to relatively high speeds in operation, that shall occupya relatively small amount of space and shall be adequately protectedfrom is lacement or injury.

T he windings of the rotating arts of dynamo-electric machines are usualy provided with cross connectors which comprise suitably insulatedcables or similar connectors, the ends of which were electricallyconnected Connectors of this character occup a considerable amount ofspace and are liable .to be injured or displaced if the member of themachine with which they are employed is operated athigh speeds.

According to my present invention, the cross-connections comprisering-shaped strap connectors of copper or other suitable material whichare of unlike diameters, and are insulated from each other by insulatingribbons or strips and firmly supported by an annular case in which theyareconcentrically mounted. Each set of coils that are to beinterconnected are electrically connected with a single ring by means ofshort flexible conductors.

Figure 1 of the accompanying; drawings is an end elevation of a portion0 the rotating member of'a dynamo-electric machine which is crossconnected in accordance with my invention and Fig. 2 is a sectionalelevatio of the parts illustrated in Fig. 1.

Referring to the drawings, a magnetizable armature core 1, h ing awinding 2, is provided with a combined end ring and coilsupport 3. Theequipotential points of the winding 2 are interconnected by a luralityof strap rin conductors 4, termina s 5 and flexible con ucting strips 6,the terminals 5 Specification of Letters Patent.

Application filed April 28. 1906.

Patented March 17, 1908.

Serial No. 314,205.

being riveted to the armature coils and clamped and soldered to theouter ends of the strips 6 and the inner ends of the strips 6 beingriveted to the rings 4. v

It will, of course, be understood that both rivets and solder or eitheralone may be employed for making each or any of the electricalconnections just described, as may be found desirable in practice.

The ring conductors 4 are separated by,. insulating ribbons or strips 7and are concentrically mounted in an annular case 8 which is fastened tothe coil-supporting ring 3. The annular case 8 comprises a plate 9having flanges 10 and i 1 at its inner and outer edges,

' respectively, and may preferably be mounted concentric with the axisof rotation of the rotating member of the machine. The inner flange-ll)is provided with a plurality of radial ad'usting screws 12.

A relatively still clamping ring 13 is interposed between the stracomluctors 4 and the inner flange 10 of the case 8 against which theends of the adjust-ing screws 12 may act. After the strap conductors 4have been assembled and pro ierl connected to the winding 2, they ma beclamped in position by tightening tie radial adjusting screws 12. Acover 14 may be fastene by screws 15, or otherwise attached, to the case8 in order to prevent axial displacement of the cross connectors.

The strap rings 4 may be insulated from the plate 9 by means of a plate16 of fuller board or similar material and from the clamping ring 13 andthe flange 11' by insulating rin s 17, 18 and 19. Insulating plates 20an 21 are alsointerposed, respectively, between the rin s 4 and thestrips 6 and between the sai strips and the cover 14.

The strap conductors 4 are preferably made of sulficient length tooverlap at their 95 ends so that the resistance between the connectors,located on op osite sides of the interruption, may be re uced, since thepressure exerted by the clamping ring 13 insures a ood electricalconnection between the ends which are overlapped.

Although the arrangement of the cross connections is illustrated inconnection with a machine which is provided with a com-- bined end ringand coil-support to which the 105 annular case is attached,.my inventionis not limited to such arrangement and the casing may be supported inany other suitable manner.

I claim as my invention:

1. In a dynamo-electric machine, the combinationwith a substantiallycylindrical core, and a winding therefor, of an annular case supportedby the core structure, cross-connecting strap conductors concentricallydisposed in said case, and insulatin rings and plates between which saidconductors are clamped.

2. In a d amo-electric machine, the combination with a core, a indingand a combined clamping ring and coil-support, of an annular caseattached to the core support, concentrically-disposed ring she eil strapconductors rigidly clamped in sai case, and strap leads between saidconductors and suitable points in the winding.

3. In a dynamo-electric machine, the com- 'bination with a cylindricalcore member and a winding, of concentrically mounted cros connectingrings for said winding, insulating strips between the cross-connectingrings, insulating rings and plates surrounding said connecting rings,and means for clamping said parts together and to said core member.

4. In a dynamo-electric machine, the combination with a core, a windingand a conbined clamping ring and coil support, of an annular caseattached to the coil support, ring sha ed strap conductorsconcentrically mounte in said case to which suitable points in thewinding are connected, inner, outer and intervening insulating rings andinsulating side lates for said strap conductors, and a plura ity ofradial adjusting screws located in afiange of the annular case.

5. In a dynamo-electric machine, the combination with an armature coreand win ding, of cross-connecting conductors which interconnectequipotential points in the winding and comprise concentrically mountedstrap conducting rings, insulating rings and plates between and aroundsaid conducting rings, anda casing in which said parts are clamped.

6. In a dynan'io-electric machine, an ar mature having cross-connectingconductors comprising annular concentric straps and radial flexiblestrips between said straps and the armature COIlS, in combination withmeans for insulating said parts and means for inclosin and clamping themin position.

, 7. In a dynamo-electric machine, an armature having cross-connectingconductors com nising annular straps, the meeting ends of which overlap,and flexible stri )s between said straps and the armature coils, incombination with means for supporting and insulating said connectingconductors.

S. In a dynamoelectric machine, an armature having crossconnectingconductors comprising concentrically dis osed annular straps andsubstantially 'ra ial strips between said straps and the armature coils,in combination with insulating means between and around the connectinconductors, and a casing in which said parts are closely fitted and camped.

9. In a dynamo-electric machine, an armature having cross connectorscomprising a \VILLIAM H FOOT.

/Vitnesses W. P. BALLARD, BIRNEY HINEs.

